Clam-shell bucket.



J. B. H. OUGHTER-LONY.

GLAM SHELL BUCKET. APPLICATION FILED JUNE 25, 1908.

Patented June 15, 1909.

4 SHEETS-SHEET 1.

J. B. H. OUOHTERLONY. GLAM SHELL BUCKET.

APPLICATION FILED JUNE 25, 1908.

925,018. Patented June 15, 1909.

4 SHEETS-SHEET 2.

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J. B. H. OUGHTERLONY. GLAM SHELL BUCKET. APPLIGATION FILED JUNE 25,1908.

925,01 8. 4 Patented June 15, 1909.

4 SHEETS-SHEET 3.

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J. B. H. OUCHTERLONY. GLAM SHELL BUCKET.

APPLICATION FILED JUNE 25, 1908.

925,018. Patented June 15, 1909.

4 SHEETS-SHEET 4.

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WE'ine-JJ Cir .are used for opening UNITED STATEO PATENT OFFTQE.

JOHN BERTIL 1-1. OUOHTERLONY, OF CLEVELAND, OHIO, ASSIGNOR TO THEMCMYLEB MANU FAOTURING COMPANY, A CORPORATION OF OHIO.

CLAIM-SHELL BUCKET.

Specification of Letters Patent.

Patented June 15, 1909.

Application filed June 26, 1908. Serial No. 4%,207.

T 0 all whom it may concern:

Be it known that 1, JOHN BERTIL H. OUCHTERLONY, a subject of the King ofSweden, residing at Cleveland, in the county of Ouyahoga and State ofOhio, have invented a certain new and useful Improvement in Clam-ShellBuckets, of which the following is a full, clear, and exact description.

The present invention relates to a type of hoisting bucket commonlyknown as the clam-shell type, and is particularly directed to the linkconnection between the sections of the bucket and the heads from whichthe sections are swung and operated.

The object of the invention is to so susend the bucket from itsoperating heads that it shall be capable of an unusually wide reachwithout diminishing in any manner the power of the closing mechanism.

While the invention has been directed primarily to the type of bucket inwhich a plurality of turns or runs of the opening and closing chain orcable is taken around sheaves angularly disposed to each other, as forexample, in the prior patent No. 616,287, Campbell, it has been mypurpose to make the structure of such generic characteristics as willmake it applicable to those buckets in which powerful steam cylindersare used for closing the bucket segments.

Referring to the accompanying drawings which illustrate differentembodiments of my invention, Figure 1 is a side elevation showing myinvention applied to a bucket having two heads of sheaves supporting thebuckets by means of link connection therewith; the open position beingindicated in dotted lines. Fig. 2 is an end elevation of the bucketshown in Fig. 1. Fig. 3 is a side elevation of a bucket embodying myinvention; the bucket segments being opened and closed by means of avertical steam cylinder. Fig. 4 is an end elevation of the bucket shownin Fig. 3. Fig. 5 is an enlarged detail showing the invention applied toa bucket in which horizontally disposed, rotary engines and closing thebucket. Fig. 6 is a vertical longitudinal section through the closingcylinders. Fig. 7 is an end elevation of the frame supporting therotating cylinders and Fig. 8 is a vertical transverse section on theline 8-8 of Fig. 6.

Referring to Figs. 1 and 2 in which a cable or chain is employed forclosing the bucket segments, it will be seen that the apparatus embodiestwo heads A, A; an upper head A to which the holding rope in which isjournaled a plurality of sheaves A for the opening and closing rope G,the sheaves being journaled on an axis mounted askew to the axis of thesheaves A on the lower head A in order to provide for the running of theopening and closing cable through its succeeding turns with the leastpossible friction, after a manner well known in the use of pulley blocksand as shown in the patent to Campbell above referred to. From the upperhead mentioned extend pivoted supporting links C C which are pivoted attheir lower ends to the outer corners of the bucket segments D D. Thelower head has mounted therein a shaft A extending transversely andhaving journaled thereon the sheaves A about which the turns of theclosing rope are run, these lower sheaves being parallel with thecentral plane of the bucket. The friction pulley A mounted in the upperhead serves to guide the opening and closing rope as it runs to thelower head. Also journaled on the lower head are a pair of levers E Epivoted to the rear edge of the bucket segments and having at theirupper end projections E rigidly connected therewith extending beyond theshaft on which they are journaled. From the ends of these projectionsdepend links E attached to the bucket segments near their inner ends andsupporting the same.

It will be seen with the arrangement just described that the bucket isopened by throwing the weight of the bucket on the holding rope B andletting the opening and closing rope B run so that the lower head A.will drop and permit the bucket to swing open pivoting on the outer endsof the links O attached to the upper head. The levers E connected withthe lower head will, as the head on which they are journaled drops, pushthe rear edge of the bucket segments outward slightly and the rocking ofthe lever projections E will thrust downward and outward the links FF bywhich the inner ends of the bucket segments are supported, thus givingthe scraping edges on the bucket a spread not ordinarily had and nothitherto attained with this type of bucket.

It will be seen that as the bucket is closed the multiple winding of theclosing rope about the sheaves of the upper and lower B is attached and1 heads will multiply the power applied to the task of drawing thebucket segments together, so that a comparatively small exertion willaccomplish a great deal of work. I do not, however, claim any part ofthis multiplication of the power applied as part of my invention as thisis, together with the idea of setting the upper and lower sheaves at anangle to each other, old and discussed in the Campbell patent abovecited. I do, however, claim the construction by which I am able to usethis powerful closing device in a manner which will enable me to attaina reach in excess of that hitherto had where such devices were used.

The construction shown in Figs. 3 and at comprises a vertical steamcylinder F to which the holding rope i3 is attached and which hassecured thereto, preferably near its upper end, pivot links C which attheir lower end pivotally support the outer ends of the bucket segments.The piston F in the cylinder has attached thereto a stem ex tendingthrough a stufling box and a cross head I at the lower end thereof, atthe extremities of which are journaled rocking levers E pivoted to theouter ends of the bucket segments in a manner similar to the links Cwhich are secured to the upper end of the engine cylinder. These rockinglevers have projections E rigid therewith extending beyond their journaland from these projections supporting links E extend downwardly and arepivotally connected at their lower ends with the inner ends of thebucket segments. IVhen it is desired to open or close the bucket theholding rope is held taut and the piston is forced downward or upward,as the case may be. It will be obvious that as the piston moves downwardthe rocking levers and the links attached thereto will spread thebuckets so that their scraping edges will have the greatest possiblereach; and as the piston is forced upward the full power of the enginewill be utilized in cansing the segments to dig deeply into the materialduring their closing movement.

In the construction shown in Figs. 5 to 8 inclusive, it will be seenthat the upper supporting head G has means for attachment to the holdingrope B and has links 0 pivoted thereto which are secured at their lowerends to the outer edges of the bucket segments after the manner of theconstruction previously described. The upper supporting head has mountedon a central horizontal shaft H, a pair of rotating cylinders I I havingrigid therewith, heads I I to which a supporting rope K is attached.These rotating cylinders are mounted in a cylindrical casing I ing intosaid casing, a piston I of suitable construction. Rigid with the casingis a head I between which and the piston as at part I the steam isadmitted for the purand each have projectpose of securing the rotationof the piston and the cylinder to which it is attached. The admissionand exhaust of the steam may be controlled. in any suitable andconventional manner. The two rotating cylinders have preferably somesuitable anti-friction bearing I between them and are mounted so as tobe rotated in opposite directions by the steam pressure. One end of theopening and closing rope K takes over one cylinder head from onedirection, while the other end of the rope takes over the second head.from the opposite direction, so that the rotation of the two cylindersunder steam pressure in one direction will cause the bight of the ropeto draw up rapidly, while the rotation of the cylinders in the oppositedirection will cause it to lower with equal rapidity. In the bight ofthis opening and closing rope is a sheave L mounted on a shaft L, alsoserving as a head, on which are journaled rocking levers E pivoted tothe outer edges of the bucket segments. These rocking levers, like theprevious construction described, have rigid therewith projections Eextending beyond the journal. From the ends of these projections dependlinks E pivoted to the inner ends of the bucket segments, the connectionof the links and rocking levers in opening the bucket giving it anincreased spread, the same in this case as in the previously describedstructures. It will thus be seen that I have attained the object of myinvention in providing a lever and link sup.- port for the bucketsegments which will give the scraping edges the greatest possibleextension a'nd which is especially attached for use in connection withthe more powerful forms of closing mechanisms now known or possible tobe used in this art.

Having thus described my invention, I claim:

1. In a hoisting bucket a head for securing to the holding means, bucketsegments pivotally connected with said head, a second head movablerelatively to the holding head and having link connection with the innerand upper ends of the bucket segments, means for giving the upper endsof the links a slight outward movement as they move downwardly.

2. In a hoisting bucket, the combination of a head, a pair of bucketsegments pivotally connected by links with said head, a second head,lever arms journaled on said second head and each connected at theirlower end with a bucket segment and having a projection extending beyondthe journal, the inner ends of the bucket segments being suspended fromsaid projections.

3. Hoisting mechanism comprising a head and a pair of bucket segmentspivotally connected with said head by links, a second head, arms journaled on said head, each arm having two parts extending from thejournal in different directions, the lower projection in each case beingconnected with a bucket segment, and the upper projection for the samearm being connected with the other bucket segment.

4. Hoisting mechanism comprising a head and a pair of bucket segmentspivotally connected with said head, a second head and oscillatorymembers journaled on said second head, each oscillatory memberarticulating with the outer end of one bucket segment and connected withthe inner end of the other bucket segment.

5. Hoisting mechanism comprising a pair of bucket segments, a head,links connected at their lower ends with said segments near their outerends and pivoted to said head, a second head, levers pivoted to the saidsegments at their outer ends and pivoted on said second head, anextension for each lever beyond the pivot thereof, and links connectingsaid extensions with the forward end of the opposite scoopsrespectively.

6. Hoisting mechanism comprising a pair of bucket segments, a head,links connected at their lower ends with said segments near their outerends and pivoted to said head, a

second head, levers pivoted to the said segments at their outer ends andpivoted on said second head, an extension for each lever beyond thepivot thereof, and links connecting said extensions with the forward endof the opposite scoops respectively, said heads being movable relativelyto each other.

7. in a hoisting bucket the combination with a head, of a pair of bucketsegments, rocking arms fulcrumed upon said head and attached at theirend to the outer ends of the bucket segments, said arms being rotatablymounted on the head and having extensions beyond their fulcrum point andlinks leading from said extensions to the forward ends of the oppositesegment, a second head, said segments having pivotal connection withsaid second head at their rear ends.

In testimony whereof, I hereunto affix my signature in the presence oftwo witnesses.

JOHN BERTIL H. ()UCHTERLONY.

Witnesses H. R. SULLIVAN, E. L. THURSTON.

